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I'm working on a system to backup logs.
I need to copy logs in an other path in order to backup. I found inotify (that i do absolutely not know) that should help me on this task but i'm not sure... I know that it is possible to work on a directory but here is what i would like to do:
When a file has been modified in a certain folder, copy that file in an other folder.
It is probably a basic thing to do but i did not find anything clear to me... If you have any idea...
For duplicating logs across multiple machines, a better approach may be to just configure rsyslog to deposit multiple copies of logs.
Or...
If you only require logs to clone each day, add a hook into your /etc/logrotate.d/* files (which ever you'd like to clone), so each time logs are rotated you do a rsync of logs from one machine to others.
If you use inotify() (likely via inotifywait or lsyncd), then you may end up in a situation where your machine is constantly thrashing (slowing down) trying to process rapid log changes into copies to other machines.
If you go the inotify() route, make sure you only do this with low volume logs (infrequent logging/changes). If you accidentally glom onto a log like syslog or Apache on a high traffic machine, you may take your machine down.
Have rsync update with a cron job, (by the minute,hourly,daily, etc..) locally and/or remotely to another system. Rsync is very nice for backups, and their are many robust options.
